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Bootstrap - full background image with a navigation bar on top

I am trying to create a full page with a background image with a navigation bar that floats on top of the image.

I have a problem that navbar pushes the image down, the image is set against the background of the html element, so I do not know why navbar has this effect.

I just use css right from the bootstrap start page, and without a navigation bar, the image matches the entire page, with the navigation bar above the image and pushing it down:

Css:

html{
            /* This image will be displayed fullscreen */
            background:url('bg.jpg') no-repeat center center;

            /* Ensure the html element always takes up the full height of the browser window */
            min-height:100%;

            /* The Magic */
            background-size:cover;
        }

        body {
            /* Workaround for some mobile browsers */
            min-height:100%;    
            padding-top: 20px;
            padding-bottom: 20px;           
        }

        .navbar {
            margin-top: 0px;
            margin-bottom: 0px;
        }

Html:

    <body>
    <div class="container">
        <nav class="navbar navbar-default navbar-custom" role="navigation">
            <div class="container-fluid">
              <!-- Brand and toggle get grouped for better mobile display -->
              <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
                  <span class="sr-only">Toggle navigation</span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="#">Brand</a>
              </div>

              <!-- Collect the nav links, forms, and other content for toggling -->
              <div class="collapse navbar-collapse navbar-ex1-collapse">
                <ul class="nav navbar-nav">
                  <li class="active"><a href="#">Link 1</a></li>
                  <li><a href="#">Link 2</a></li>
                  <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                    <ul class="dropdown-menu">
                      <li><a href="#">Action</a></li>
                      <li><a href="#">Another action</a></li>
                      <li><a href="#">Something else here</a></li>
                      <li><a href="#">Separated link</a></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                  </li>
                </ul>

                </div><!-- /.navbar-collapse -->
            </div>
        </nav>
    </div>

The effect I want to finish is the image of the entire page, and the navigation bar sits with the image depicting below it, rather than pushing the image down, so that it starts after the navigation bar.

+4
3

2 CSS html:

 body {
            background:url('bg.jpg') no-repeat center center;
            background-size:cover;  

            /* Workaround for some mobile browsers */
            min-height:100%;    
            padding-top: 20px;
            padding-bottom: 20px;
        }
+5

body.

html{

         height: 100%;
         width: 100%;

       }
        body {
            /* Workaround for some mobile browsers */
            min-height:100%;    
            padding-top: 20px;
            padding-bottom: 20px;
              /* This image will be displayed fullscreen */
            background:url('http://www.radioviva.fm.br/images/backgrounds/bg-squares-dark.jpg') no-repeat center center;

            /* Ensure the html element always takes up the full height of the browser window */
            min-height:100%;

            /* The Magic */
            background-size:cover;
        }

        }

        .navbar {
            margin-top: 0px;
            margin-bottom: 0px;
        }
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
 <div class="container">
        <nav class="navbar navbar-default navbar-custom" role="navigation">
            <div class="container-fluid">
              <!-- Brand and toggle get grouped for better mobile display -->
              <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
                  <span class="sr-only">Toggle navigation</span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="#">Brand</a>
              </div>

              <!-- Collect the nav links, forms, and other content for toggling -->
              <div class="collapse navbar-collapse navbar-ex1-collapse">
                <ul class="nav navbar-nav">
                  <li class="active"><a href="#">Link 1</a></li>
                  <li><a href="#">Link 2</a></li>
                  <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                    <ul class="dropdown-menu">
                      <li><a href="#">Action</a></li>
                      <li><a href="#">Another action</a></li>
                      <li><a href="#">Something else here</a></li>
                      <li><a href="#">Separated link</a></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                  </li>
                </ul>

                </div><!-- /.navbar-collapse -->
            </div>
        </nav>
    </div>
Hide result
+2

Add your background to the body - not html

body {
  /* Workaround for some mobile browsers */
  background: url('bg.jpg') no-repeat center center;
  background-size: cover;
  min-height: 100vh;
  padding-top: 20px;
  padding-bottom: 20px;
}

see here: http://codepen.io/anthu/full/KVeOyV/

+2
source

Source: https://habr.com/ru/post/1626838/

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